ERRATUM: repeated factors of (M+2)43112609

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Apr 28, 2010, 7:49:23 AM4/28/10
to Mersenneplustwo
Two previously cited factors of (M+2)43112609 were in fact composite,
and combinations of other, already discovered, smaller factors. [The
main website page _should_ now have been corrected, as of today,
currently showing only 5 distinct factors of (M+2)43112609, rather
than 7].
Many thanks to Karim Belabas and Robert Holmes, on the PARI-dev list
who helped me to spot this.
Just shows the importance of testing factors for primality!

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